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Btrfs: skip readonly root for snapshot-aware defragment

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Btrfs send is assuming readonly root won't change, let's skip readonly root.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Wang Shilong 2014-02-08 23:46:35 +08:00 committed by Josef Bacik
parent 850a8cdffe
commit bcbba5e659
1 changed files with 5 additions and 0 deletions
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5
fs/btrfs/inode.c
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@ -2240,6 +2240,11 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
return PTR_ERR(root);
}
if (btrfs_root_readonly(root)) {
srcu_read_unlock(&fs_info->subvol_srcu, index);
return 0;
}
/* step 2: get inode */
key.objectid = backref->inum;
key.type = BTRFS_INODE_ITEM_KEY;